diff --git a/infrastructure.md b/infrastructure.md
index 535f22b77..8e804ae21 100644
--- a/infrastructure.md
+++ b/infrastructure.md
@@ -168,6 +168,8 @@ These are:
 We will address all of the files later in the training.
 For now, we will move on to complete the basic setup of the lesson.
 
+
+
 ### Configuring a Lesson Repository
 
 #### Activating GitHub Pages
@@ -246,6 +248,12 @@ We will revisit the `life_cycle` and `carpentry` fields in `config.yaml` later i
 
 :::
 
+#### `.Rproj` file
+
+The repository also contains a file called `FIXME.Rproj`, a project file that RStudio (a commonly-used editor for working on lessons) can use to track some options and preferences for working on your lesson on your local machine. This file should be renamed.
+You can call this file whatever you like,
+but the convention is for its name to match that of the lesson repository.
+
 #### `README.md`
 
 The README.md file is the “front page” of your lesson repository on GitHub, and is written in Markdown.
diff --git a/md5sum.txt b/md5sum.txt
index 6ad0c8f89..8bec6a16a 100644
--- a/md5sum.txt
+++ b/md5sum.txt
@@ -13,7 +13,7 @@
 "episodes/objectives.md" "79869207b33a74cf1887aff488b0b41c" "site/built/objectives.md" "2023-08-30"
 "episodes/episodes.md" "571f85f6160b89e7e571ba72a31db434" "site/built/episodes.md" "2023-08-25"
 "episodes/long-break1.md" "3a4802231bb8e44cc6c132d86afb7f78" "site/built/long-break1.md" "2023-08-21"
-"episodes/infrastructure.md" "d1652edb66dd21f3524ec8737b835ecd" "site/built/infrastructure.md" "2023-09-29"
+"episodes/infrastructure.md" "5dcf719e95c200d4ecbe2f701fffa1af" "site/built/infrastructure.md" "2023-09-29"
 "episodes/short-break2.md" "05d1044278ce40ab59d9397db1f0e383" "site/built/short-break2.md" "2023-08-21"
 "episodes/episode-objectives.md" "b930e3b1659f6dd694c727e016efe925" "site/built/episode-objectives.md" "2023-08-25"
 "episodes/short-break3.md" "05d1044278ce40ab59d9397db1f0e383" "site/built/short-break3.md" "2023-08-21"